Spanish and UK-based PIs may now apply at any time of the
year for a few hours of telescope time to: (i) conduct feasibility
studies for future 'full' proposals, (ii) respond to newly-discovered
targets-of-opportunity, or (iii) to propose observations in support of
new projects that have just been allocated time on other telescopes.

Full details and access to the web-based proposal form are available
here.